As it is an autoimmune disorder I think nothing we can do about it
Here is clear what I mean about the toenail;
“Psoriasis of the nails can resemble other conditions such as chronic infection or inflammation of the nail bed or nail fold. Psoriasis of the toenails can resemble chronic fungal infection of the nails”
As it is an autoimmune disorder I think nothing we can do about it,
besides the immunosupresor treatments.